CN105927661B

CN105927661B - Joint for climbing frame

Info

Publication number: CN105927661B
Application number: CN201610101606.3A
Authority: CN
Inventors: 户所信二
Original assignee: Agatsuma Co Ltd
Current assignee: Agatsuma Co Ltd
Priority date: 2015-02-26
Filing date: 2016-02-24
Publication date: 2020-02-28
Anticipated expiration: 2036-02-24
Also published as: JP2016154768A; JP6538370B2; EP3061505A1; CN105927661A; HK1224353A1; US20160250509A1; CA2920296A1; US10307629B2; TW201632238A; TWI681804B; EP3061505B1

Abstract

The invention provides a climbing frame joint which is easy to bend pipe fittings, and the climbing frame joint (30L) is provided with: a joint main body (32) having a joint shaft (32a) to which a plurality of pipe pieces (133, 203, 206) and the like are connected; a rotating member (33) formed in a short bar shape, and having one end side to which the pipe (203, 703) is connected. A bent portion (31) capable of bending the pipe fitting is formed in the two-strand portion of the rotating member, and a flat plate-like portion in which a joint body (32) is sandwiched is formed. A covering member (34) is provided on the outer periphery of the bent portion (31). The covering member (34) is provided with: a restricting wall portion that restricts a bent state of the pipe by abutting the peripheral wall against the two-strand portion of the rotating member or the flat plate-like portion of the joint main body 32; and a notch portion that forms a notch so that the peripheral wall does not abut against the two-strand portion of the rotating member or the flat plate portion of the joint main body, so as to release the bent state of the pipe.

Description

Joint for climbing frame

Technical Field

The invention relates to a joint for a climbing frame, which is a foldable climbing frame allowing an infant to play indoors.

Technical Field

In the past, climbing frames have been proposed which allow children to play indoors. Such an indoor climbing frame is a game toy in which an infant can be immersed and played because the same game as that of an outdoor climbing frame installed in a park or the like can be played indoors by combining a plurality of cubic frames.

Such indoor climbing frames tend to be large in size. Therefore, when not in use, a bent portion provided with a bent pipe member is adopted as a joint for connecting the pipe member in order to enable compact storage. The bent portion has a locking mechanism that does not cause the pipe to be bent unexpectedly when the climbing frame is used. For example, the disclosure of the inventionNotice3102074A joint assembly of a folding climbing stand, wherein a rotation preventing cover is provided on a pivot connection part between a fixed pipe joint and a rotary pipe joint so as to be able to advance and retreat. And, set up the fitting pin in the rotation pipe fitting joint of connecting the pipe fitting, be equipped with the fitting pin accepting hole in the rotation prevents with covering the cover.

When the climbing stand is used, the rotation-preventing sheath is fitted to the pivot-support connecting portion. Thus, the rotation preventing jacket is abutted against the rotation pipe fitting joint to prevent bending of the pipe fitting in the pivot connection portion. And at the same time, the locking pin of the rotating pipe fitting joint is embedded into the locking pin accommodating hole of the rotation preventing sheath, so that the rotation preventing sheath is prevented from rotating around the axis. In addition, when the climbing frame is folded, the locking pin is separated from the locking pin accommodating hole by pressing the locking pin. In this manner, the rotation-preventing jacket can be separated from the rotating pipe joint along the pipe.

Disclosure of Invention

Problems to be solved by the invention

In the joint for a climbing stand, the rotation preventing sheath is configured to perform the forward and backward movement operation of the bent portion of the pipe as the pivot connection portion to bend the pipe, that is, to restrict and release the folding of the climbing stand. At this time, since the rotation-preventing jacket advances and retreats along the pipe, the time may be increased by the increase of the stroke for performing the operation. Thus, all the operations of inserting and removing the provided plurality of rotation preventing covers become more complicated.

The invention aims to provide a joint for a climbing stand, which can easily perform the limiting operation and the releasing operation of the pipe bending operation in the bending part for folding the climbing stand.

The climbing frame joint related to the invention comprises: a joint main body having a joint shaft connecting a plurality of pipes; and a rotating member formed in a short bar shape, connecting the pipe on one end side; the other end side of the rotating member and the joint main body form a bending part which enables the flat plate-shaped part to be clamped into the two-strand part and enables the pipe fitting to be bent; a cylindrical covering member that is provided on an outer periphery of the bent portion and is capable of rotating around an axis thereof while being restricted from moving in the axis direction, the covering member including: a limiting wall portion that limits the bending of the bent portion by abutting a peripheral wall against the flat plate-shaped portion or the two-strand shaped portion; and a notch portion that is formed so that the peripheral wall does not abut against the flat plate-shaped portion or the two-strand shaped portion, so as to release the bent state of the bent portion.

The cover member has a protrusion protruding from an inner peripheral surface, and the bent portion has a guide groove formed around an axial center thereof and slidably engaged with the protrusion.

In addition, the guide groove is provided with a rotation limiting portion abutting against the protrusion portion.

In addition, the guide groove is formed on the rotating member in a groove shape.

In addition, the flat plate-like portion is formed on the joint main body, and the two-strand portion is formed on the rotating member.

The protruding end portion of the flat plate-shaped portion is provided with a rotation restricting projection which is in a convex arc shape in a plan view and protrudes from the protruding end portion, and a contact portion which is in a concave arc shape in a plan view and which is engaged with the protruding end portion of the flat plate-shaped portion and which contacts the rotation restricting projection is provided in a surface between two strands of the two-strand portion facing the protruding end portion of the flat plate-shaped portion.

Further, the cover member has a rotary engagement portion formed in a convex or concave shape on an inner peripheral surface thereof, and the rotary member or the joint main body has:

the limiting clamping part is clamped with the rotating clamping part when one part is in a bending state of limiting the bending part; and a releasing engagement portion that engages with the rotation engagement portion when the other is in a state where the bent portion is released.

With the joint for a climbing frame according to the present invention, by rotating the covering member around the axis of the pipe, it is possible to perform releasing of the bending of the bent portion for folding the climbing frame or locking of the bent portion for use of the climbing frame. Thus, the stroke for operation can be shortened, and the locking and releasing operation of the bent portion can be performed in a short time.

Further, a protrusion is provided on the inner surface of the covering member, and a guide groove for guiding the protrusion is formed in the bent portion by combining the rotating member or the pipe with the rotating member. Thereby, a structure for rotating the cover member can be simply formed.

Further, by providing the rotation restricting portion in the guide groove in contact with the protruding portion, the cover member can be prevented from rotating over the head.

In addition, if the guide groove is provided in the rotary member, even when the tube is removed from the rotary member, the cover member can be maintained in the state of being attached to the rotary member, and thus the loss of the cover member when the tube is removed for storage can be reduced.

Further, the bent portion is configured to: the flat plate portion is formed on the joint main body, and the two-strand portion is formed on the rotating member, whereby the notch portion of the cover member can be formed in accordance with the thickness of the flat plate portion. Accordingly, the peripheral wall of the restricting wall portion as the covering member can be secured more, whereby the covering member having high rigidity can be formed.

In addition, in the bending angle range between the rotary member and the joint body, since the abutting portion provided on the rotary member is restricted by abutting against the rotation restricting projection provided on the joint body, for example, when the bending operation of the pipe is to be performed at 90 degrees, the bending operation can be surely restricted.

In addition, the cover member is provided with a rotation engaging portion, and the rotation member or the joint body can be provided with a restricting engaging portion and a releasing engaging portion. Thus, since the click feeling, i.e., the positioning feeling can be obtained when the released state and the restricted state of the bent portion are switched, the rotation operation of the covering member can be surely performed.

Drawings

Fig. 1 is a perspective view of a climbing stand according to an embodiment of the present invention.

Fig. 2 is a perspective view showing a joint and a connecting pipe member for a climbing frame according to an embodiment of the present invention.

Fig. 3 is an exploded perspective view showing a joint and a connecting pipe member for a climbing frame according to an embodiment of the present invention.

Fig. 4 is a perspective view of a joint body according to an embodiment of the present invention.

Fig. 5 is a perspective view showing a rotary member according to an embodiment of the present invention, fig. 5(a) is a perspective view seen from above, and fig. 5(b) is a perspective view seen from below.

Fig. 6 shows a covering member according to an embodiment of the present invention, fig. 6(a) is a front view, and fig. 6(b) is a perspective view.

Fig. 7 is a cross-sectional view of a main part of a joint for a climbing stand and a connecting pipe x-y according to an embodiment of the present invention in a plane.

Fig. 8 is a view showing a joint for a climbing stand and a connecting pipe member according to an embodiment of the present invention, fig. 8(a) is a main enlarged view showing a state where a cover member is rotated, and fig. 8(b) is a main enlarged view showing a state where the pipe member is bent.

Fig. 9 is a plan view showing a joint and a connecting pipe member for a climbing stand according to an embodiment of the present invention, in a bent state.

Fig. 10 is a perspective view showing the folding state of the climbing stand according to the embodiment of the present invention.

Fig. 11 is a plan view showing a climbing frame according to an embodiment of the present invention, fig. 11(a) is a diagram showing an expanded state which is a use state, and fig. 11(b) is a diagram showing a folded state which is a storage state.

Figure 12 is a perspective view showing an example of use of the climbing frame according to the embodiment of the present invention.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings. The climbing stand 10 in the present embodiment is a game toy of the climbing stand mainly installed indoors, and is formed to be foldable and storable. Accordingly, fig. 1 is a view showing a state in which the climbing stand 10 is unfolded and used. In the following description, the front side of the creel 10, i.e., the positive direction in the x-axis direction, will be referred to as the front side, and the back side, i.e., the negative direction in the x-axis direction, will be referred to as the back side. The explanation will be given with the left side of the creel 10 as viewed from the front, that is, the negative direction of the y-axis direction, set as the left side, and the right side, that is, the positive direction of the y-axis direction, set as the right side. The explanation will be given with the upward direction of the climbing frame 10, i.e., the positive direction in the z-axis direction, set as upward and the downward direction, i.e., the negative direction in the z-axis direction, set as downward.

As shown in fig. 1, in the climbing frame 10, a plurality of cylindrical pipes 101 to 110 and the like are connected to a plurality of climbing frame joints 30A to 30H and the like, respectively, in each direction of the x-axis, the y-axis, and the z-axis which are perpendicular to each other.

The climbing frame 10 is formed by combining a plurality of cubic frames. At the lowermost layer, a base frame group 100 including three cube frames, and an additional base frame 600 are provided. On the upper side of the base frame group 100, a half frame group 200 is connected, and the half frame group 200 includes three half cube frames having a height of about one half of a cube frame. An upper half frame 300 formed of one half cube frame is connected to the upper side of the half cube frame in the center of the half frame group 200. A top frame 400, which is a cubic frame, is connected to the upper side of the upper half frame 300.

In the joint for a climbing frame 30A and the like formed with an angle of 90 degrees on each of the x, y, and z axes, joints for a climbing frame of the same symbol are formed as a common element. These joints for climbing frames are formed in a three-to-six-hexagonal shape according to the position where they are used.

The climbing stand 10 has three cubic frames formed continuously in the y-axis direction with the lowermost layer as the base frame group 100. Specifically, the cubic frame at the center of the base frame group 100 has four

tubes

102, 103, 202, and 203 in the x-axis direction, four

tubes

106, 109, 206, and 209 in the y-axis direction, and four

tubes

132, 133, 136, and 137 in the z-axis direction. The tubes are connected to climbing

frame joints

30B, 30C, 2 30F, 3 30J, 30L.

The cubic frames are continuously connected to the left and right sides in the y-axis direction at the center of the base frame group 100. The

pipes

102 and 202 and the

pipes

103 and 203 in the x-axis direction, the

pipes

132 and 136 and the

pipes

133 and 137 in the z-axis direction, the climbing frame joint 30B connected to these pipes, and the like in the cubic frame at the center of the base frame group 100 form common components with the left and right cubic frames.

Further, a half frame group 200 continuous with the base frame group 100 in the y-axis direction is connected to the upper side of the base frame group 100, and the half frame group 200 includes three half cubic frames having a height in the z-axis direction of about half of the cubic frame of the base frame group 100. For example, the half cubic frame at the center of the half frame group 200 is configured to have four

pipes

202, 203, 302, 303 in the x-axis direction, four

pipes

206, 209, 306, 309 in the y-axis direction, and four

pipes

232, 233, 236, 237 in the z-axis direction. And these pipe members are connected to seven joint for climbing frame 30J and one joint for climbing frame 30L.

The

pipes

202 and 302 and the

pipes

203 and 303 in the x-axis direction, the

pipes

232 and 236 and the

pipes

233 and 237 in the z-axis direction, the fitting 30L for the climbing frame connected to these pipes, and the like in the half cube frame at the center of the half frame group 200 form common constituent elements with the left and right half cube frames. The

pipes

202 and 206, etc. corresponding to the x-axis and y-axis directions of the lower side of the half frame group 200, and the fitting 30L for a climbing frame, etc. to which these pipes are connected, form common components with the cubic frame of the base frame group 100.

An upper half frame 300, which is the same half cube frame as the half cube frame of the half frame group 200, is connected to the upper side of the half cube frame at the center of the half frame group 200. Similarly, in the half-cube frame of the upper half frame 300, the

pipes

302 and 306 and the like constituting the upper side of the half-cube frame adjacent to the center of the lower half frame group 200, and the fitting 30J for a climbing frame to which these pipes are connected are common constituent elements.

Further, a top frame 400 formed of a cubic frame is connected to the upper side of the upper half frame 300. The cubic frame of the top frame 400 is formed in the same size as the cubic frame of the base frame group 100. Like the sample, the top frame 400 also has the

tubes

402 and 406 and the like in the x-axis and y-axis directions corresponding to the lower side, and the fitting 30H and the like for the climbing frame connected by these tubes, which are common components together with the tube and the fitting for the climbing frame connected adjacently corresponding to the upper side of the upper half frame 300.

Further, an additional base frame 600 formed of a cubic frame is connected to the base frame group 100 so as to face the x-axis direction from the cubic frame at the end in the y-axis direction. The cubic frame of the additional base frame 600 is formed in the same size as the cubic frames of the base frame group 100 and the top frame 400. The

pipes

107 and 133 and the like corresponding to the rear side of the additional base frame 600, and the fitting 30C for a climbing frame to which these pipes are connected are common components of the cubic frame connected to the base frame group 100.

Further, a fixing member 60 is provided at a position corresponding to the rear side of the top frame 400. The fixing member 60 has flat surface portions formed in front and rear of the body portion 61. The main body 61 is formed in an arc shape in an upper direction as viewed from the front, and in a substantially triangular shape in a lower direction. An upper engaging portion 62 that engages with the pipe 509 in the y-axis direction is provided above the body portion 61. Similarly, a lower engaging portion 63 for engaging with the pipe 409 in the y-axis direction, a left engaging portion 64 for engaging with the left and

right pipes

436, 437 in the z-axis direction, and a right engaging portion 65 are provided on the lower side of the body 61.

Further, the bent pipe member 70 spanning the

climbing frame joints

30J, 30H is connected to the climbing frame joints 30H connected to the

pipe members

238, 304, 310 at positions offset in the positive direction of the y-axis and the negative direction of the z-axis from the climbing frame joint 30J on the rear right side, that is, the climbing frame joint 30J connected to the

pipe members

403, 409, 437, 337; the right rear climbing frame joint 30J is a common component between the top frame 400 and the upper half frame 300.

The climbing frame 10 thus formed has the

x-axis pipes

101 and 102 and the like all formed as common elements having the same size. Also, the

pipes

105, 205, etc. in the y-axis direction become common elements. The

tubes

131 and 231 in the z-axis direction are formed of two types of tubes, which will be described later, that is,

long tubes

131 and 432 having a length equal to that of a rectangular frame, and

tubes

231 and 332 having a length equal to half that of the long tubes and constituting a half rectangular frame.

The climbing frame joints 30A and the like are different only in the number of the bendable x-axis pipe 101 and the like and the fixed y-axis and z-

axis pipes

105 and 131 connected to each other, and the connecting portions of these pipes have the same structure. Therefore, the climbing frame joint described below is described by taking, as an example, the climbing frame joint 30L that is a hexagonal branched joint, in other words, the climbing frame joint 30L that is an upper hexagonal branched joint that forms a common component between the base frame group 100 and the additional base frame 600.

As shown in fig. 2,

pipes

703 and 203 are connected to the climbing frame joint 30L in the front and rear direction in the x-axis direction. In the same sample, the

pipes

206 and 207 in the left and right y-axis direction and the

pipes

233 and 133 in the up and down z-axis direction are connected. The joint 30L for a climbing stand is formed with a bent portion 31, and the bent portion 31 is configured to allow the

pipe members

703 and 203 in the x-axis direction to be bent within an angular range of 90 degrees. Further, a substantially cylindrical covering member 34 is provided on the outer periphery of the bent portion 31 connected to the pipe 203 on the x-axis direction rear side. The cover member 34 is configured to be rotatable about the axis of the cover member 34 while restricting movement of the cover member 34 in the axial direction. By performing a turning operation of the cover member 34, the folded state of the folded portion 31 can be restricted or released.

As shown in fig. 3, the joint 30L for the climbing frame includes a joint body 32, two turning members 33 arranged in the front and rear direction of the x-axis direction, and the cover member 34. As shown in fig. 4, in the joint body 32, joint shafts 32a connected to the pipe 206 and the like are provided to protrude from the base portion 32b in the left and right y-axis direction and the up and down z-axis direction, respectively. The joint shaft 32a is formed in a substantially cylindrical shape. Two long notches 32a1 are formed in the outer peripheral wall of the joint shaft 32a in parallel along the axial center of the joint shaft 32 a. An engaging projection 32a2 is provided on the outer peripheral wall of the joint shaft 32a between the two notches 32a 1. Further, two notches 32a1 and two engaging projections 32a2 are also provided on the outer peripheral wall of the one joint shaft 32a on the opposite side to the one joint shaft.

The entire joint main body 32 is formed by injection molding of a resin material. Accordingly, the outer peripheral wall supporting the engaging projection 32a2 is provided with an elastic force by the action of the notch 32a 1. On the other hand, the outer peripheral wall in the vicinity of both end portions of the pipe 206 and the like is provided with engaging holes 180 at four locations at equal intervals in the circumferential direction, which engage with the engaging projections 32a2, respectively, see fig. 2 and 3.

Therefore, when the pipe 206 or the like is inserted into the joint shaft 32a, the engaging projection 32a2 is recessed inward in the radial direction of the joint shaft 32 a. When the engagement hole 180 is positioned at the position of the engagement projection 32a2, the engagement projection 32a2 receives an elastic force and engages with the engagement hole 180, thereby ending the insertion operation of the tube 206 and the like. The insertion tube 206 and the like are formed in an inclined shape so that the engagement projection 32a2 becomes lower toward the outer peripheral surface of the joint shaft 32 a. Thereby, the insertion of the pipe 206 and the like can be easily performed.

The joint shafts 32a facing each other are configured such that holes formed in the inner surface of the cylindrical portion are communicated with each other. Therefore, inside the base portion 32b, holes formed in the inner surfaces of the cylindrical portions of the left and right y-axis direction joint shafts 32a and the upper and lower z-axis direction joint shafts 32a intersect.

Further, on the base portion 32b side in the joint shaft 32a, an annular portion 32a3 having a larger diameter than the cylindrical portion of the joint shaft 32a is formed. The outer peripheral surface of the annular portion 32a3 is configured to be continuous with the outer peripheral surface of the pipe 206 or the like when the pipe 206 or the like is inserted and connected to the joint shaft 32 a.

The joint main body 32 is formed so that flat plate-like portions 32c project from the base portion 32b toward the front and rear in the x-axis direction. The flat plate-like portion 32c protruding forward and the flat plate-like portion 32c protruding rearward have the same shape. The flat plate portion 32c is formed in a substantially flat plate shape with the flat surface portion facing in the vertical direction. Four recesses 32c1 for thinning are formed in the upper and lower flat surface portions of the flat plate-like portion 32 c.

The flat plate portion 32c has a through hole 32c2 at a substantially central position on the plane. A pin member is inserted into the through hole 32c2 together with the through hole 33b1 of the rotary member 33, see fig. 5. Accordingly, the rotating member 33 is rotatably supported by the flat plate portion 32 c.

The protruding end portion 32c3 of the flat plate-shaped portion 32c is formed in a convex arc shape in a plan view, and a rotation restricting protrusion 32c4 having a side surface continuous with the side surface of the flat plate-shaped portion 32c is formed at one terminal end portion of the convex arc shape. In other words, in the combined state, the rotation restricting protrusion 32c4 protrudes toward the rotating member 33, see fig. 7. Further, since the flat plate-like portions 32c are formed in the same shape as described above, the front rotation restricting projection 32c4 is formed in the positive direction in the x-axis direction, which is the right end of the protruding end portion 32c3, and the rear rotation restricting projection 32c4 is formed in the negative direction in the x-axis direction, which is the left end of the protruding end portion 32c 3.

On the other hand, concave non-through engaging holes are provided as the restricting engaging portions 32c5 on the left and right side surfaces of the flat plate-shaped portion 32 c. The restricting engagement portion 32c5 is engaged with a projecting rotation engagement portion 34c of a cover member 34 described later so as to be freely engageable with and disengageable from the rotation engagement portion.

Next, the rotating member 33 will be described with reference to fig. 5(a) and (b). Fig. 5(a) is a perspective view of the rotating member 33 as viewed from above, and fig. 5(b) is a perspective view as viewed from below. The rotating member 33 is formed in a short bar shape by injection molding of a resin material. A cylindrical joint shaft 33a into which the pipe 203 and the like are inserted and connected is formed on one end side of the rotating member 33. The joint shaft 33a is provided with two notches 33a1 and an engaging projection 33a2 parallel to the circumferential outer wall. Two notches 33a1 and two engaging protrusions 33a2 are formed at two positions on the outer circumferential wall facing the cylindrical shape. The function of inserting the pipe 203 or the like into the joint shaft 33a is the same as that of the joint shaft 32a in the joint main body 32.

The other end side of the rotating member 33 is formed with a bifurcated portion 33 b. The outer peripheral surface of the two-strand portion 33b is formed to have an arc-shaped longitudinal section. When the pipe 203 or the like is connected, the outer peripheral surface of the bifurcated portion 33b is formed in a substantially same plane as the outer peripheral surface of the pipe 203 or the like. The tip end portions of the two strand portions 33b are formed in a convex arc shape in plan view. Therefore, the rotary member 33 can avoid interference with the base end of the flat plate portion 32c of the joint main body 32 during the bending motion.

Further, a through hole 33b1 is provided in a substantially central portion of the outer peripheral surface of the bifurcated portion 33b, the outer peripheral surface of which is countersunk (counter sink). Referring to fig. 4, the connection between the flat plate-shaped portion 32c and the bifurcated portion 33b of the joint main body 32 is configured such that the flat plate-shaped portion 32c is sandwiched between the bifurcated portions 33b, and the through-hole 33b1 and the through-hole 32c2 of the flat plate-shaped portion 32c are connected by a pin member as described above.

Further, an engaging hole having a concave shape and not penetrating therethrough is provided on the outer peripheral surface of the bifurcated portion 33b on the side of the joint shaft 33a facing the through hole 33b1 as the release-time engaging portion 33b 2. The engagement portion 33b2 is engaged with a rotary engagement portion 34c of a projecting shape in the cover member 34, which will be described later, so as to be freely engageable with and disengageable from the engagement portion at the time of release, see fig. 6.

The surface 33b3 between the two strands of the two-strand portion 33b faces the protruding end portion 32c3 of the flat plate-shaped portion 32c when connected to the flat plate-shaped portion 32c of the joint main body 32. The surface 33b3 between the two strands of the two-strand shaped portion 33b is formed in a concave arc shape in plan view to fit the protruding end portion of the flat plate-shaped portion. As shown in fig. 7, the surface 33b3 is also provided with a contact portion 33b4 as a stepped portion.

The state in which these joint main bodies 32 and the rotary member 33 are coupled will be described with reference to the cross-sectional view of fig. 7. As shown in fig. 7, in the state where the

pipes

203 and 703 are deployed, the abutting portion 33b4 of the rotating member 33 abuts against the rotation restricting projection 32c4 of the flat plate-shaped portion 32c in the joint main body 32. Thus, from the expanded state, the rotation of the

pipes

203 and 703 in the counterclockwise direction around the pin member passing through the through hole 32c2 or the through hole 33b1 is restricted. When the cover member 34 is rotated to bend the pipe 203, the cover member 34 is rotated clockwise in fig. 7, and the cover member 34 is rotated to abut against the annular portion 32a 3. Similarly, even in the pipe 703, when the pipe is bent, the bent rotating member 33 is rotated clockwise to abut against the annular portion 32a3 of the joint main body 32. Thus, the

tubes

203, 703 can be bent in one direction over an angle of about 90 degrees.

Returning to fig. 5, a guide groove 33b5 having a cross-sectional groove shape is formed in the circumferential direction around the axial center at the base end portion of the bifurcated portion 33b of the rotary member 33. The guide groove 33b5 is engaged with a projection 34b of a cover member 34 described later so as to be slidable, see fig. 6. Further, a rotation restricting portion 33b6 is formed at the base end portion of the bifurcated portion 33b so as to be orthogonal to the guide groove 33b 5. The rotation restricting portions 33b6 are formed at two opposite positions as shown in fig. 5(a) and (b).

The peripheral wall 33b7 constituting the guide groove 33b5 is connected to one side surface in the circumferential direction of the end portion of the rotation restricting portion 33b6 on the joint shaft 33a side. An opening 33b8 is formed in the end of the rotation restricting portion 33b6 on the joint shaft 33a side, on the other side in the circumferential direction, so as to cut the circumferential wall 33 b. The open portions 33b8 are also formed at two positions facing each other. When the cover member 34 is assembled to the rotary member 33, the protruding portions 34b at two places of the cover member 34 are inserted into the open portions 33b8 at the two places in alignment, respectively.

The axial position of the pipe 203 or the like connected to the rotary member 33 is positioned by the engagement of the engagement projection 33a2 with the engagement hole 180. Accordingly, the surface of the peripheral wall 33b7 on the joint shaft 33a side is brought close to or into contact with the end surface of the pipe 203 or the like. As another structure of the guide groove 33b5, the guide groove may be formed by an end surface of the pipe 203 or the like to be connected and a peripheral stepped portion into which the outer peripheral surface of the bifurcated portion 33b is recessed instead of the peripheral wall 33b 7. In this case, the cover member 34 can be rotatably provided around the axial center by inserting the cover member 34 into the rotary member 33 and starting connection of the pipe 203 or the like. Therefore, positioning between the protrusion 34b of the cover member 34 and the open portion 33b8 will not be required at the time of assembly.

Next, the covering member 34 will be described with reference to fig. 6(a) and (b). The cover member 34 is formed in a cylindrical shape. The cover member 34 is provided with a notch portion 34a formed in a notch shape on the outer peripheral wall. The notches 34a are formed at two opposite positions. Adjacent to the notch portion 34a and the circumferential wall portion, a restricting wall portion 34e for restricting the bending of the bent portion 31 is provided as will be described later.

On the inner peripheral surface of the cover member 34 at the same position as the notch portion 34a, protruding portions 34b are formed at two locations in the circumferential direction so as to oppose each other by a predetermined length. On the inner peripheral surface of the restriction wall portion 34e, convex rotation engagement portions 34c are formed at two positions facing each other at an angle shifted from the projection portion 34b by 90 degrees. A plurality of projecting anti-slip projections 34d that are long in the axial direction are formed on the outer peripheral surface of the cover member 34.

The covering member 34 thus formed is slidably engaged with the guide groove 33b5 by the projection 34b as described above. Therefore, the cover member 34 can be freely rotated around the axial center of the cover member 34, and the movement of the cover member 34 in the axial direction can be restricted.

On the other hand, the restricting engagement portion 32c5 of the flat plate-shaped portion 32c that engages with the rotation engagement portion 34c of the cover member 34 and the releasing engagement portion 33b2 of the rotating member 33 are provided so as to be offset by 90 degrees in phase difference about the axial direction. Accordingly, when the cover member 34 is rotated within an angular range of 90 degrees around the axial center, the rotational engagement portion 34c is engaged with the restricting engagement portion 32c5 or the releasing engagement portion 32b2 at the end of the angular range. Thus, the operator can feel the click feeling through the turning operation. Further, the rotation operation of the cover member 34 is not more than 90 degrees and the rotation is performed over the head, and the protrusion 34b is restricted by abutting against the rotation restricting portion 33b 6.

The switching between the bending-restricted state and the released state and the bending operation by the covering member 34 of the bent portion 31 are performed as follows. As shown in fig. 2 and 7, in the cover member 34, when the notch portion 34a is located in the two-leg portion 33b, even if the tube 203 is to be bent, the two side surfaces of the flat plate portion 32c abut against the two limiting wall portions 34e of the cover member 34, and thus the bending of the tube 203 in the bent portion 31 is limited.

When the cover member 34 is rotated by 90 degrees, the notch 34a is positioned on both side surfaces of the flat plate portion 32c as shown in fig. 8 (a). Since the notch 34a is cut to a thickness corresponding to the flat plate portion 32c, the bending of the bent portion 31 is released, and the pipe 203 can be bent as shown in fig. 8(b) and 9.

In a state where the bending of the bent portion 31 is restricted as shown in fig. 2 and 7, the rotation engagement portion 34c of the cover member 34 engages with the restricting engagement portion 32c5 of the flat plate portion 32 c. On the other hand, in the state where the folding of the folded portion 31 is released as shown in fig. 8(a), (b) and 9, the rotational engagement portion 34c of the cover member 34 is engaged with the release-time engagement portion 33b2 of the bifurcated portion 33 b. Thus, since the rotation engaging portion 34c is brought into the engaged state in each of the restricted state and the released state, it is possible to feel that the state is completely switched to any one state by the click feeling due to the engagement of the engaging portion.

In addition to the above-described joints 30L for a climbing frame, the joints disposed at the top of each cubic frame are formed as follows. The bifurcated climbing frame joint 30A, E, G, K, N, P has three

joint shafts

32a, 33a in total, and these

joint shafts

32a, 33a are two joint shafts 32a in which a base portion 32b is fixed to protrude from three sides at an angle of 90 degrees from each other, and one joint shaft 33a which is bendable. The four-side branched climbing frame joint 30B, F, H, Q includes: three fixed joint shafts 32a having an angle of 90 degrees to each other in a plane and protruding from the base portion 32 b; and a bendable one joint shaft 33a, a base portion 32b of which protrudes from a plane direction formed perpendicular to the three joint shafts 32 a. The four-side branched climbing frame joint 30D includes: two joint shafts 32a fixed to have an angle of 90 degrees and protruding from the base portion 32 b; and two bendable joint shafts 33a protruding from the base portion 32b toward both sides in a direction perpendicular to a plane formed by the two joint shafts 32 a. The five-part climbing frame joint 30J includes: four fixed joint shafts 32a having an angle of 90 degrees to each other in a plane and protruding from the base portion 32 b; and a bendable one joint shaft 33a protruding from the base portion 32b in a direction perpendicular to a plane formed by the four joint shafts 32 a. The five-part bifurcated climbing frame joint 30C, M includes: three fixed joint shafts 32a having an angle of 90 degrees to each other in a plane and protruding from the base portion 32 b; and a total of two bendable joint shafts 33a protruding from the base portion 32b on both sides in a direction perpendicular to a plane formed by the three joint shafts 32 a.

In this way, the flat plate-like portion 32c of the joint main body 32 and the two-leg portion 33b of the rotating member 33 are connected to the bendable portion 31, and the pipe 203 or the like for connecting all the x-axis directions of the climbing frame joint 30A or the like is provided. On the other hand, the covering member 34 may be provided only on the bent portion 31 at least at one point in the same module formed by the cubic frame and the half cubic frame connected in the z-axis direction.

For example, as shown in fig. 1, in the assembly having the following structure, if the covering member 34 is provided on at least one of the bent portions 31, the bent state of the bent portion 31 of the entire assembly can be restricted or released; the assembly comprises: the top frame 400 includes a base frame group 100, a half frame group 200 connected to the upper side in the z-axis direction together with the base frame group 100, an upper half frame 300 connected to the upper side in the z-axis direction together with a half cubic frame at the center of the half frame group 200, and a top frame including a cubic frame connected to the upper side in the z-axis direction together with the upper half frame 300.

However, in order to stably use the climbing frame 10, it is preferable that the covering member 34 is provided at least at the

joints

30J and 30L for climbing frame to which both ends of the x-axis

direction pipe members

202, 302, 203, and 303 of the half cubic frame at the center of the half frame group 200 are connected. This is because, among the components such as the cube frames, which are vertically stacked, the cube frame or the like in the central portion is subjected to a large load during use.

Further, at least one covering member 34 must be additionally provided on the bent portion 31 of the additional base frame 600 as a cubic frame additionally connected to the assembly.

Next, the folding operation of the creel 10 will be described. First, the covering members 34 in the creel 10 are collectively rotated and operated in the unfolded state of fig. 1, and all are bent to be in the released state. After that, the climbing frame 10 is folded to form the configuration shown in fig. 10.

That is, the folded climbing frame 10 is configured such that, in the unfolded state, in two cubic frames adjacent to the left side, the pipes in the y-axis direction, for example, the pipe 206 and the pipe 208, which face each other, are arranged so as to be nearly close to each other in the x-axis direction, for example, the pipe 202. In the y-axis direction, for example, the tube 205 and the

tubes

206 and 207 are arranged in series in the expanded state, and the tube 201 and the

tubes

202 and 203 in the x-axis direction are folded to be arranged in series in parallel with the y-axis direction while maintaining the series state. In this way, the thickness of the base frame group 100 of the climbing frame 10 in the folded state can be aligned almost closely to three pipes, for example, the pipe 202 in the x-axis direction and the

pipes

206 and 208 in the y-axis direction.

These bent portions 31 are turned and bent in the same direction. That is, as shown in fig. 11(a) and (b), the arrow P, which is the direction in which the bent portion 31 of the front climbing frame joint 30K or the like in the base frame group 100 or the top frame 400 is bent and rotated, and the arrow Q, which is the direction in which the bent portion 31 of the rear climbing frame joint 30N or the like is bent and rotated, are rotated clockwise as viewed from above in fig. 11(a) and (b). The bent portion 31 of the climbing frame joint 30K or the like of the base frame 600 may be rotated and bent clockwise.

Even if the half frame group 200, the upper half frame 300, and the top frame 400 are provided above the base frame group 100 to form a module, the module has only three component thicknesses of the pipe as shown in fig. 11(a) and (b). Even if the additional base frame 600 is provided, all the pipes are in close contact with each other in the thickness direction, and therefore, the pipe can be folded to have a minimum thickness.

Furthermore, for example in the climbing frame 10, as shown in fig. 12, pedals 81, 82 or skis 83 or stages 84 may be provided. Here, the pedals 81 and 82 refer to the pedal 81 provided on the left-end half cube frame in the half frame group 200, and the pedal 82 provided on the additional base frame 600. The pedal 81 is placed so as to engage with the

pipes

301 and 302 in the x-axis direction and the

pipes

305 and 308 in the y-axis direction. In the same time, the pedal 82 is mounted so as to engage with the

x-axis direction pipes

703 and 704 and the y-

axis direction pipes

707 and 207. Accordingly, the pedals 81 and 82 also restrict the bending of the bent portion 31 such as the climbing frame joint 30A in the climbing frame 10.

The slide 83 is provided on the pipe 703 of the additional base frame 600. However, a slide longer than the slide may be prepared and connected to the pipe 305 of the half frame group 200. In this case, since the slide is longer than the slide 83 shown in fig. 12, the climbing frame 10 can be made to fit the age and physical strength of the infant.

The fixing member 60 is pleasing to the child by decoration of the flat surface portion. Since the fixing member 60 is fixed to the y-axis pipe 409 and the like and the z-axis pipe 436 and the like, it can be folded while maintaining the state of being attached to the climbing frame 10. Further, since the bent pipe member 70 can be used as a handrail, even a young child can enjoy the climbing frame 10. The bent tube 70 is mounted in parallel with the y-z plane, similarly to the fixing member 60, and thus can be folded while maintaining the mounted state.

While the embodiments of the present invention have been described above, the present invention is not limited to the embodiments, and can be implemented in various forms. For example, the relationship between the two-leg portion 33b of the rotary member 33 and the flat plate-like portion 32c of the joint main body 32 may be reversed, the flat plate-like portion may be provided in the rotary member 33, and the two-leg portion may be provided in the joint main body 32.

Further, the cover member 34 may be provided on the joint main body 32. Alternatively, the protrusion 34b of the cover member 34 and the guide groove 33b5 of the rotary member 33 may be reversed, the guide groove may be provided in the cover member 34, and the protrusion may be provided in the rotary member 33. Also, the concave-convex relationship among the rotating engagement portion 34c of the covering member 34 formed in the convex shape, and the restricting engagement portion 32c5 and the releasing engagement portion 33b2 formed in the concave shape may be reversed. In the present embodiment, the pipe 203 or the like is directly connected to the joint shaft 33a of the rotary member 33, but may be indirectly connected via a spacer or the like. In the present embodiment, the bent portion 31 is formed to be rotatable within an angular range of 90 degrees, but the angular range may be set arbitrarily.

In the present embodiment, the bending direction of the bending portion 31 is formed to be parallel to the x-y plane, but may be formed to be parallel to the x-z plane to fold the entire climbing frame 10 in the vertical direction. In this case, however, when the three-dimensional frame is superimposed on the base frame group 100, the three-dimensional frame may be the same as the three-dimensional frame of the base frame group 100, or the three-dimensional frame may be connected in the y-axis direction to the same three-dimensional frame as the half frame group 200 or the like.

The number and the connection direction of the cubic frame and the half cubic frame are not particularly limited in the structure of the climbing stand 10.

Industrial application

In this embodiment, the fitting for a climbing stand according to the present invention can be used for a joint for a climbing stand in which the operation of restricting and releasing the pipe bending operation can be easily performed in the bending portion for folding the climbing stand.

In addition, the embodiments described above are presented as examples and are not intended to limit the present invention. These new embodiments can be implemented in various other embodiments, and various omissions, substitutions, and changes can be made without departing from the spirit and scope of the present invention. These embodiments and modifications are intended to be included in the scope and spirit of the present invention and also in the claims and their equivalent scope.

Description of the symbols

10: the climbing frame 20: half frame group

30A to 30H: the joints for the climbing frame are 30J-30N: joint for climbing frame

30P to 30Q: joint for climbing frame 31: a bent part

32: joint main body 32 a: joint shaft

32a 1: notch portion 32a 2: snap-in projection

32a 3: circular ring portion 32 b: base part

32b 2: engagement portion at release time 32 c: tabular part

32c 1: recess 32c 2: through hole

32c 3: protruding end portion 32c 4: rotation limiting projection

32c 5: limiting engagement portion 33: rotating member

33 a: joint shaft 33a 1: notch part

33a 2: engaging projection 33 b: two-thigh part

33b 1: through hole 33b 2: engaging part when released

33b 3: face 33b 4: abutting part

33b 5: guide groove 33b 6: rotation restricting part

33b 7: peripheral wall 33b 8: open part

34: cover member 34 a: notch part

34 b: projection 34 c: rotating clamping part

34 d: anti-slip projections 34 e: limiting wall

60: fixing member 61: main body part

62: upper engaging portion 63: lower engaging part

64: left engaging portion 65: right side engaging part

70: bending the pipe member 81: pedal

82: pedal 83: slide

84: stage 100: base frame group

101-110: 131-138: pipe fitting

180: engaging hole 200: half frame group

201-210: pipe fitting 231 ~ 238: pipe fitting

300: upper half frame

301-310:

pipes

332, 333, 336, 337: pipe fitting

400:

top boxes

402, 403, 406, 409: pipe fitting

432. 433, 436, 437: pipe fitting

502. 503, 506, 509: pipe fitting

600:

additional base boxes

603, 604, 607: pipe fitting

633. 634:

pipe

703, 704, 707: pipe fitting

Claims

1. A joint for a climbing frame is characterized by comprising:

a joint main body having a joint shaft connecting a plurality of pipes;

a rotating member formed in a short bar shape and connected to the pipe at one end side;

the other end side of the rotating member and the joint main body form a bent portion which causes the flat plate-shaped portion to be sandwiched between the two-strand shaped portions and bends the pipe;

a cylindrical covering member which is provided on the outer periphery of the bent portion, is restricted in movement in the axial direction, and is rotatable about the axial center;

the cover member includes:

a limiting wall portion that limits the bending of the bent portion by abutting a peripheral wall against the flat plate-shaped portion or the two-strand shaped portion,

the protruding end part of the flat plate-shaped part is provided with a rotation limiting protrusion which is in a convex arc shape in a plan view and protrudes from the protruding end part;

an abutting portion is provided on a surface between the two strands of the two-strand shaped portion facing the protruding end portion of the flat plate-shaped portion, and the abutting portion is shaped like a concave arc that fits the protruding end portion of the flat plate-shaped portion in a plan view and abuts against the rotation restricting projection.

2. The fitting for a climbing frame of claim 1,

the cover member is formed with a protrusion portion protruding from an inner peripheral surface;

the bent portion forms a guide groove in a direction around the axis, and the guide groove is slidably engaged with the protrusion.

3. The fitting for a climbing frame of claim 2,

the guide groove is provided with a rotation restricting portion abutting against the projecting portion.

4. The joint for a climbing stand according to claim 3,

the guide groove is formed in a groove shape on the rotating member.

5. The fitting for a climbing frame of claim 1,

the flat plate-shaped portion is formed on the joint main body, and the two-strand-shaped portion is formed on the rotating member.

6. The fitting for a climbing frame of claim 2,

7. The joint for a climbing stand according to claim 3,

8. The fitting for a climbing frame of claim 4,

9. The joint for a climbing frame according to any one of claims 1 to 8,

the cover member has a rotary engaging portion formed in a convex or concave shape on an inner peripheral surface;

on the one hand, a limiting engaging portion is formed on the rotating member or the joint body, and when the rotating member or the joint body is in a bent state of limiting the bent portion, the rotating member or the joint body is engaged with the rotating engaging portion; on the other hand, a releasing engagement portion is formed to engage with the rotation engagement portion in a state where the bent portion is released.